1.
Study on preparation of silicon micro-powders with high-purity and ultra-thin crystals by iron free contamination method
无铁污染法制备高纯超细结晶型硅微粉的研究
2.
Study on the Preparation of Highpurity and Ultrafine Quartz Micropowders by Agitation Ball Milling Method without Iron Contamination
无铁污染搅拌球磨法制备高纯超细硅微粉的研究
3.
free of weeds, contamination, pollution, etc
无杂草、 传染、 污染等.
4.
The emergent repairing process of slowly released iron (Ⅲ) chloride-magnetic module without damage for treating the surface water body polluted by Cr～(3+)
缓释氯化铁-磁性模块处理Cr~(3+)污染地表水体的应急无损修复工艺
5.
Environmental pollution transcends administrative boundaries.
环境污染，无分疆界。
6.
"Clean:Free from dirt, stain, or impurities; unsoiled."
干净的:无灰尘、污迹或杂质的;未污染的.
7.
One way to get rid of the polluted air is to build a car that does not pollute.
消除污染的方法便是制造一种无污染的汽车。
8.
She fights alongside the Sentinel in the neverending battle to cleanse the land of the unholy Scourge.
在无休止的战斗中，她为铁卫军竭尽全力净化被邪恶的天谴军团污染的土地。
9.
a spot caused the staining with rust or ink.
因铁锈或墨水染上的污点。
10.
Study on Dematerialization of Gas Pollutant for Iron & Steel Enterprise;
关于钢铁企业气体污染物减量化研究
11.
Iron Oxides Photocatalyst Degradation Toxic Organic Pollutants;
铁氧化物光催化降解有毒有机污染物
12.
Study on Prevention and Control of Arsenic Toxicity by Calcium, Magnesium and Iron;
钙、镁、铁对土壤砷污染的治理研究
13.
Treatment of Organic Toxic Pollutants in Wastewater Using the Zero-valence Iron Process;
零价铁法处理废水中有机毒害污染物
14.
Analyses and Countermeasures of Environmental Pollution of The Catering Industry in Tieling City
铁岭市饮食行业环境污染分析与对策
15.
THE QSPR INVESTIGATION OF THE DEGRADATION OF CHLORINATED CONTAMINATION BY ZERO-VALENT IRON
零价铁降解氯代有机污染物的QSPR研究
16.
Remediation of Sediments Contaminated with 1,3-Dichlorobenzene Using Zero-Valent Iron
零价铁修复1,3-二氯苯污染底泥
17.
Low-nitrogen combustion technology, smokeless and odorless, without harmful gas.
无二次污染低氮燃烧技术，无烟，无臭，无有害气体。
18.
It is necessary to remove the dirt and pathogenic bacteria, to avoid contaminating germ free or sanitizing articles and to avoid infection and cross-infection.
答：除去手上的污垢及污染的致病菌，避免污染无菌物品或清洁物品，避免感染和交叉感染。